Connected: An Internet Encyclopedia
RFC 821 - Sending and Mailing Scenarios

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### Sending and Mailing Scenarios

First the user's name is verified, then an attempt is made to send to the user's terminal. When that fails, the messages is mailed to the user's mailbox.

             R: 220 SU-SCORE.ARPA Simple Mail Transfer Service Ready
             S: HELO MIT-MC.ARPA
             R: 250 SU-SCORE.ARPA

             S: VRFY Crispin
             R: 250 Mark Crispin <Admin.MRC@SU-SCORE.ARPA>

             S: SEND FROM:<EAK@MIT-MC.ARPA>
             R: 250 OK

             S: RCPT TO:<Admin.MRC@SU-SCORE.ARPA>
             R: 450 User not active now

             S: RSET
             R: 250 OK

             S: MAIL FROM:<EAK@MIT-MC.ARPA>
             R: 250 OK

             S: RCPT TO:<Admin.MRC@SU-SCORE.ARPA>
             R: 250 OK

             S: DATA
             R: 354 Start mail input; end with <CRLF>.<CRLF>
             S: Blah blah blah...
             S: ...etc. etc. etc.
             S: .
             R: 250 OK

             S: QUIT
             R: 221 SU-SCORE.ARPA Service closing transmission channel

                                   Scenario 5

Doing the preceding scenario more efficiently.

             R: 220 SU-SCORE.ARPA Simple Mail Transfer Service Ready
             S: HELO MIT-MC.ARPA
             R: 250 SU-SCORE.ARPA

             S: VRFY Crispin
             R: 250 Mark Crispin <Admin.MRC@SU-SCORE.ARPA>

             S: SOML FROM:<EAK@MIT-MC.ARPA>
             R: 250 OK

             S: RCPT TO:<Admin.MRC@SU-SCORE.ARPA>
             R: 250 User not active now, so will do mail.

             S: DATA
             R: 354 Start mail input; end with <CRLF>.<CRLF>
             S: Blah blah blah...
             S: ...etc. etc. etc.
             S: .
             R: 250 OK

             S: QUIT
             R: 221 SU-SCORE.ARPA Service closing transmission channel

                                   Scenario 6

Next: Mailing List Scenario

Connected: An Internet Encyclopedia
RFC 821 - Sending and Mailing Scenarios